so whats the dif between an amp and signal booster?...i have the main cable line running into the apartment from outside..that same line is split, one into the TV and one into another splitter, then from there its one into my cable modem and the other to yet ANOTHER splitter which one runs into one bedroom and the other into the other bedroom...(thats ALOT of splitting right) also the lines are very very long..(20ft or more)..i got one thats 50ft LOL...i dont think this setup will be staying like this for long though..

are there any other known ways of boosting a signal to get better picture? i just switch my connection from my digital cable terminal to TV from that standard cable(coaxial i think its called) to the composite cables.... small difference in picture but it was noticeable.. the noise and artifacts are still present but the picture brightness increase and the color's changed overall. i think if i go from composite to S-video there might be an even better increase yay?...

For that many connections it would be best to have them fed from one point. Let's say you have a distribution amp, (2nd link you posted) connected. All the necessary hookups would octopus out from the distribution amp, instead of being daisy-chained along one cable, That would be preferable.
That would be an advantage because each connection represents some degree of loss. More loss than the 50' of cable.

As far as viewing, HD requires components cables, or HDMI (or DVI) cables to your display, no other kind will work for you.

Non HD can also use S-Video or composite. You can trial and error different ones for the best picture.

Yes, you can get an inline amplifier or booster (just different terminology) for cable lines. The inline amps are generally better than the small silver box amps. But no comparison to a good cable configuration with a distribution amp. If you use a inline amp, have the amp located before your greatest number of connections, and the power module (which puts DC at the center conductor of the cables to power the amp) would be located near your setup.
Again, your biggest loss here is splitting off the signal numerous times.
Centrally locating and feeding out to the locations, as I mentioned, would be preferable.

i was just over at The Source(by circuit city) and found a 4-way 2ghz Amplifier...it was for $29.99 i believe by Nexxtek...i think im going to pick it up...since i need 4 cable lines (living room, bedroom, other bedroom and cablemodem)...i think i also saw a Monster version of it..but it was like twice as much and it was only a 3-way Amp splitter....i think this is essential because of all the splits i have in my apartment...I dont have a HDTV(yet) but when i get one im worried about the cablemodem, since that one line coming into the apartment will feed both the HD/SD signals AND broadband internet... thats ALOT of data running through just one COAX line...would it be wize to get the cable company to insert a additional cable line into the apartment for the HD, i wouldnt care if it cost alittle extra for the service but im assuming its worth it, having that one single line for the HD data to flow through etc..etc..

wow.. so im like totally screwed currently!?! .. i have all these 2-way splitters and only one of them says bi-directional on it..(i just looked at them) and there only 1Ghz......ok thats the next thing i have to get, is an amp big time..the ones i saw where like 2400MHZ(2.4Ghz), its pretty sad that one of the splitters is from the Dollarstore also LOL!!...

I Just got the Motorola booster484095-001-00 at Circuit City and it works great after some small problems.. I only have one HDTV and have no need for a splitter. The connector on the ant it seems to be spring loaded. As I push the coax cable on it, it pushed the crappy cable out and didn't make a strong connection. Every time I plugged the cable in I lost all reception. To make a long story shot it was my very poor cable that caused all the problems from my ant. The only way I could fix the problem was to use a Monster 2gig splitter before the booster and plug the ant cable in there and then run a coax monster cable to the booster. Now it works Great!!!